1 /* $NetBSD: i80321_pci.c,v 1.9 2007/10/17 19:53:43 garbled Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * PCI configuration support for i80321 I/O Processor chip. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: i80321_pci.c,v 1.9 2007/10/17 19:53:43 garbled Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/device.h> 48 #include <sys/extent.h> 49 #include <sys/malloc.h> 50 51 #include <uvm/uvm_extern.h> 52 53 #include <machine/bus.h> 54 55 #include <arm/xscale/i80321reg.h> 56 #include <arm/xscale/i80321var.h> 57 58 #include <dev/pci/ppbreg.h> 59 #include <dev/pci/pciconf.h> 60 61 #include "opt_pci.h" 62 #include "opt_i80321.h" 63 #include "pci.h" 64 65 void i80321_pci_attach_hook(struct device *, struct device *, 66 struct pcibus_attach_args *); 67 int i80321_pci_bus_maxdevs(void *, int); 68 pcitag_t i80321_pci_make_tag(void *, int, int, int); 69 void i80321_pci_decompose_tag(void *, pcitag_t, int *, int *, 70 int *); 71 pcireg_t i80321_pci_conf_read(void *, pcitag_t, int); 72 void i80321_pci_conf_write(void *, pcitag_t, int, pcireg_t); 73 74 #define PCI_CONF_LOCK(s) (s) = disable_interrupts(I32_bit) 75 #define PCI_CONF_UNLOCK(s) restore_interrupts((s)) 76 77 void 78 i80321_pci_init(pci_chipset_tag_t pc, void *cookie) 79 { 80 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 81 struct i80321_softc *sc = cookie; 82 struct extent *ioext, *memext; 83 uint32_t busno; 84 #endif 85 86 pc->pc_conf_v = cookie; 87 pc->pc_attach_hook = i80321_pci_attach_hook; 88 pc->pc_bus_maxdevs = i80321_pci_bus_maxdevs; 89 pc->pc_make_tag = i80321_pci_make_tag; 90 pc->pc_decompose_tag = i80321_pci_decompose_tag; 91 pc->pc_conf_read = i80321_pci_conf_read; 92 pc->pc_conf_write = i80321_pci_conf_write; 93 94 #if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE) 95 /* 96 * Configure the PCI bus. 97 * 98 * XXX We need to revisit this. We only configure the Secondary 99 * bus (and its children). The bus configure code needs changes 100 * to support how the busses are arranged on this chip. We also 101 * need to only configure devices in the private device space on 102 * the Secondary bus. 103 */ 104 105 busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR); 106 busno = PCIXSR_BUSNO(busno); 107 if (busno == 0xff) 108 busno = 0; 109 110 ioext = extent_create("pciio", 111 sc->sc_ioout_xlate + sc->sc_ioout_xlate_offset, 112 sc->sc_ioout_xlate + VERDE_OUT_XLATE_IO_WIN_SIZE - 1, 113 M_DEVBUF, NULL, 0, EX_NOWAIT); 114 115 #ifdef I80321_USE_DIRECT_WIN 116 memext = extent_create("pcimem", VERDE_OUT_DIRECT_WIN_BASE + VERDE_OUT_DIRECT_WIN_SKIP, 117 VERDE_OUT_DIRECT_WIN_BASE + VERDE_OUT_DIRECT_WIN_SIZE- 1, 118 M_DEVBUF, NULL, 0, EX_NOWAIT); 119 #else 120 memext = extent_create("pcimem", sc->sc_owin[0].owin_xlate_lo, 121 sc->sc_owin[0].owin_xlate_lo + VERDE_OUT_XLATE_MEM_WIN_SIZE - 1, 122 M_DEVBUF, NULL, 0, EX_NOWAIT); 123 #endif 124 125 aprint_normal("%s: configuring PCI bus\n", sc->sc_dev.dv_xname); 126 pci_configure_bus(pc, ioext, memext, NULL, busno, arm_dcache_align); 127 128 extent_destroy(ioext); 129 extent_destroy(memext); 130 #endif 131 } 132 133 void 134 pci_conf_interrupt(pci_chipset_tag_t pc, int a, int b, int c, int d, int *p) 135 { 136 } 137 138 void 139 i80321_pci_attach_hook(struct device *parent, struct device *self, 140 struct pcibus_attach_args *pba) 141 { 142 143 /* Nothing to do. */ 144 } 145 146 int 147 i80321_pci_bus_maxdevs(void *v, int busno) 148 { 149 150 return (32); 151 } 152 153 pcitag_t 154 i80321_pci_make_tag(void *v, int b, int d, int f) 155 { 156 157 return ((b << 16) | (d << 11) | (f << 8)); 158 } 159 160 void 161 i80321_pci_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) 162 { 163 164 if (bp != NULL) 165 *bp = (tag >> 16) & 0xff; 166 if (dp != NULL) 167 *dp = (tag >> 11) & 0x1f; 168 if (fp != NULL) 169 *fp = (tag >> 8) & 0x7; 170 } 171 172 struct pciconf_state { 173 uint32_t ps_addr_val; 174 175 int ps_b, ps_d, ps_f; 176 }; 177 178 static int 179 i80321_pci_conf_setup(struct i80321_softc *sc, pcitag_t tag, int offset, 180 struct pciconf_state *ps) 181 { 182 uint32_t busno; 183 184 i80321_pci_decompose_tag(sc, tag, &ps->ps_b, &ps->ps_d, &ps->ps_f); 185 186 busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR); 187 busno = PCIXSR_BUSNO(busno); 188 if (busno == 0xff) 189 busno = 0; 190 191 /* 192 * If the bus # is the same as our own, then use Type 0 cycles, 193 * else use Type 1. 194 * 195 * XXX We should filter out all non-private devices here! 196 * XXX How does private space interact with PCI-PCI bridges? 197 */ 198 if (ps->ps_b == busno) { 199 if (ps->ps_d > (31 - 16)) 200 return (1); 201 /* 202 * NOTE: PCI-X requires that that devices updated their 203 * PCIXSR on every config write with the device number 204 * specified in AD[15:11]. If we don't set this field, 205 * each device could end of thinking it is at device 0, 206 * which can cause a number of problems. Doing this 207 * unconditionally should be OK when only PCI devices 208 * are present. 209 */ 210 ps->ps_addr_val = (1U << (ps->ps_d + 16)) | 211 (ps->ps_d << 11) | (ps->ps_f << 8) | offset; 212 } else { 213 /* The tag is already in the correct format. */ 214 ps->ps_addr_val = tag | offset | 1; 215 } 216 217 return (0); 218 } 219 220 pcireg_t 221 i80321_pci_conf_read(void *v, pcitag_t tag, int offset) 222 { 223 struct i80321_softc *sc = v; 224 struct pciconf_state ps; 225 vaddr_t va; 226 uint32_t isr; 227 pcireg_t rv; 228 u_int s; 229 230 if (i80321_pci_conf_setup(sc, tag, offset, &ps)) 231 return ((pcireg_t) -1); 232 233 PCI_CONF_LOCK(s); 234 235 bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_OCCAR, 236 ps.ps_addr_val); 237 238 va = (vaddr_t) bus_space_vaddr(sc->sc_st, sc->sc_atu_sh); 239 if (badaddr_read((void *) (va + ATU_OCCDR), sizeof(rv), &rv)) { 240 isr = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_ATUISR); 241 bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_ATUISR, 242 isr & (ATUISR_P_SERR_DET|ATUISR_PMA|ATUISR_PTAM| 243 ATUISR_PTAT|ATUISR_PMPE)); 244 #if 0 245 printf("conf_read: %d/%d/%d bad address\n", 246 ps.ps_b, ps.ps_d, ps.ps_f); 247 #endif 248 rv = (pcireg_t) -1; 249 } 250 251 PCI_CONF_UNLOCK(s); 252 253 return (rv); 254 } 255 256 void 257 i80321_pci_conf_write(void *v, pcitag_t tag, int offset, pcireg_t val) 258 { 259 struct i80321_softc *sc = v; 260 struct pciconf_state ps; 261 u_int s; 262 263 if (i80321_pci_conf_setup(sc, tag, offset, &ps)) 264 return; 265 266 PCI_CONF_LOCK(s); 267 268 bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_OCCAR, 269 ps.ps_addr_val); 270 bus_space_write_4(sc->sc_st, sc->sc_atu_sh, ATU_OCCDR, val); 271 272 PCI_CONF_UNLOCK(s); 273 } 274